Improvement in griping and cutting tools



2Sheets--Sheetl. 1. LINDSAY. 'Griping and Gutting'Tnnls. No. 146,829.Patentedlan. 27,1314.

-Griping and Gutting Tools. No. 146,829. Patemedl mzn'mu.

UNITED STATES PATENT Orrron.

JAMES LINDSAY, OF NEYV YORK, N. Y.

IMPROVEMENT lN GRlPlNG AND CUTTING TOOLS Specification forming part ofLetters Patent No. 146,829, dated January 27, 1874; application filedAugust 5, 1873.

To all whom it may concern:

Be it known that I, JAMES Lnvnsnv, of the city, county, and State of NewYork, have invented a new and useful Improvement in Pliers, Pinchers,860., of which the followingis a specification:

This invention relates to that class of implements provided with movablejaws, constructed for cutting, griping, punching, and similar purposes.It is designed to furnish a tool in which the jaws may be operated withmuch greater force than has hitherto been found practicable with suchdevices.

The invention consists in a novel combination, with the shanks ofsuitably-provided jaws, of elbow-levers, so constructed and arranged asto enable a powerful leverage to be exerted upon the jaws when inoperation, thereby securing the desired and hereinbefore-specifiedresult.

Figure 1 represents a cutting-pliers made according to my invention,with its jaws closed; and Fig. 2 shows the same with the jaws opened orspread. Figs. 3, 4, and 5 are views, respectively, of a pipe-wrench, agriping-pliers, and a belt or sheet-metal punch, constructed accordingto my invention.

A A are the jaws of the implement, capable of movement to and from eachother, being pivoted together at a, and each providedwith abackwardly-extending shank, b. The said jaws are of any required shape,according to the purpose to which the tool is to be applied-eforinstance, formed with cuttingedges, as in Figs. 1 and 2,with angular orroughened recesses for griping cylindrical bodies, as in Fig. 3, withplane gri 'iing-surfaces, as in Fig. 4, or with punch and die, as inFig.5. B B are levers, the main lengths of which constitute the handles ofthe implement, but which, at their inner portions, are bent inwardlytoan elbow, forming an acute angle, as shown-at a. At or about the curveof its elbow each of the said elbow-levers is pivoted to the extremityof one of the shanks b by pivots f, and the inner extremities of the twoelbow-levers are joined by a pivot, f. Therefore, by moving the handlesapart, or fl'om each other, the pivoted ends of the shanks b are broughtinward by the toggle-joint action of the aforesaid levers to spread thejaws, and, by bringing the said handles toward each other, the reversedaction of the toggle-jointed ends b of the elbow-levers force the shanksb apart to bring the jaws together, the power increasing with thislastnamed movement of the parts as the elbow or inner portions 0 of thelevers are brought nearer in line with each other.

It will be noticed that, as represented in the drawings, the parts areso arranged that, when the jaws are brought together, or to the limit oftheir movement toward each other, the elbow or inner portions 0 of thelevers B are brought, with the pivots f and f, not quite in line witheach other. This insures the effioient operation of the implement, evenwhen the cutting-edges, when such are used, are

ground away, as in repeated sharpening, or when, from wear or othercause, an increased outwardunovement of the shanks b is necessary toclose the jaws to the required extent, the additional inward movementpermitted to the jointed ends 0, in such event,before bringing thepivots f f in line, compensating for the motion lost from the causesjust hereinbefore specified. i

O is a stop to prevent the cutting-edges in Figs. 1 and 2 from strikingtogether.

hat I claim as my invention is- The combination of the shanks A ofcutting or gripin g jaws,joined by the pivot a, with the acute-angledelbow-levers B, pivoted together at f, and to the aforesaid shanks at f,substantially as and for the purpose specified.

JAMES LINDSAY. WVitncsses: V

J AMES A. WHITNEY, CHAS. E. QUETIL.

